title: Lateral supraorbital approach applied to anterior clinoidal meningiomas: experience with 73 consecutive patients.
abstract: BACKGROUND
  Anterior clinoidal meningiomas (ACMs) are a subgroup of meningiomas accounting for less than 10% of supratentorial meningiomas.
  
  
  OBJECTIVE
  To assess the reliability and safeness of the lateral supraorbital approach (LSO) to remove ACMs.
  
  
  METHODS
  Between September 1997 and October 2009, a total of 73 ACM patients were operated on at the Department of Neurosurgery, Helsinki University Central Hospital, by the senior author (J.H.). We retrospectively analyzed the clinical data, radiological findings, surgical treatment, histology, and outcome of patients, and discuss the operative technique.
  
  
  RESULTS
  Seventy-three patients were operated on by applying the LSO approach. Apparently complete removal was achieved in 57 patients (78%). Anterior clinoidectomy was performed in 21 cases. Preexisting visual deficit improved in 11 of 39 patients and worsened in 4; 3 had de novo visual deficit. At 3 months after discharge, 60 (82%) patients had a good recovery, 9 (12%) patients were moderately disabled, 1 presented with severe disability, and 3 (4%) patients died of surgery-related causes. Sixteen (22%) patients had residual tumors, 6 of which required reoperation. During the median follow-up of 36 months (range, 3-146), tumor recurred in 3 patients: 2 were followed-up and 1 was reoperated on.
  
  
  CONCLUSIONS
  ACMs can be removed via the LSO approach with relatively low morbidity and mortality. Anterior clinoidectomy is required only in selected cases, and we prefer the intradural approach during the LSO approach. High-power coagulation should be avoided in proximity of the optic nerve.
authors.affiliation: Department of Neurosurgery, Helsinki University Central Hospital, Helsinki, Finland. rossana.romani@hus.fi
authors.forename: Rossana
authors.initials: R
authors.lastname: Romani
authors.forename: Aki
authors.initials: A
authors.lastname: Laakso
authors.forename: Marko
authors.initials: M
authors.lastname: Kangasniemi
authors.forename: Martin
authors.initials: M
authors.lastname: Lehecka
authors.forename: Juha
authors.initials: J
authors.lastname: Hernesniemi
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D049669:History, 16th Century; D006801:Humans; D008297:Male; D008577:Meningeal Neoplasms / Q000473:pathology / Q000601:surgery*; D008579:Meningioma / Q000473:pathology / Q000601:surgery*; D008875:Middle Aged; D019635:Neurosurgical Procedures / Q000379:methods*; D012189:Retrospective Studies